Rosa hybrida shrub named ‘AUSquaker’

ABSTRACT

A variety of rose plant of the shrub class, named ‘AUSquaker’. The ‘AUSquaker’ is a variety of a rose shrub with blooms containing two-colored petals, yellow from the base to the middle, blending towards an orange top half of the petal. The overall appearance is of rich apricot blooms, which begin as striking, red-tipped buds and gradually open to reveal large informal rosettes, each with ruffled petals and a button eye. They are very resistant to rain damage and the petals drop neatly. The fragrance is light-medium tea. The plant is a vigorous grower producing strong, arching stems and particularly reliable and healthy.

Classification: The present invention relates to a new Rosa hybridashrub of the market class ‘English Rose’.

Variety denomination: The new plant has the varietal denomination‘AUSquaker’.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to UK Plant Patent No. 5/2136,filed Sep. 26, 2017, and European CPVO 2017/2476, filed Oct. 3, 2017.

ORIGIN OF INVENTION

This invention relates to a new and distinct variety of shrub rose plantnamed ‘AUSquaker’, which was originated from the cross-pollination ofthe two ‘unnamed’ and unpatented seedlings of Rosa hybrida.

BACKGROUND OF THE INVENTION

The primary objective of this breeding was to produce a rose varietywith blooms containing two-colored petals, yellow from the base to themiddle, blending towards an orange top half of the petal. The overallappearance is of rich apricot blooms, which begin as striking,red-tipped buds and gradually open to reveal large informal rosettes,each with ruffled petals and a button eye. They are very resistant torain damage and the petals drop neatly. The fragrance is light-mediumtea. The plant is a vigorous grower producing strong, arching stems andparticularly reliable and healthy.

SUMMARY OF THE INVENTION

Among the features which distinguish the new variety from otherspresently available and commercial rose cultivars known to the inventoris the following combination of characteristics: two-colored petalsresulting in a rich apricot bloom, red-tipped buds, large informalrosette-shaped blooms, ruffled petals, button eyes, blooms that areresistant to rain damage, and vigorous arching stems.

Asexual reproduction of the new variety by budding as performed atBowling Green Lane in Albrighton, Britain shows that the foregoing andother distinguishing characteristics come true to form and areestablished and transmitted through succeeding asexual propagations.‘AUSquaker’ may be asexually propagated by budding. The buddingsuccessfully occurred on the plant/rootstock Rosa ‘Dr. Huey’ in the USand Rosa dumetorum in the UK for the observed plants.

COMPARISON WITH PARENTS

The maternal and paternal parents of ‘AUSquaker’ are two unnamedseedlings. The new rose may be distinguished from its maternal parent,by the following combination of characteristics: the maternal parent iscream with a deep cupped bloom and upright growth, as opposed to theshallower rosettes and arching growth of ‘AUSquaker’. The new rose maybe distinguished from its pollen parent, by the following combination ofcharacteristics: the paternal parent was apricot pink with uprightgrowth, whereas ‘AUSquaker’ is a rich apricot with yellow coloring andarching growth.

COMPARISON WITH THE CLOSEST COMMERCIALLY AVAILABLE CULTIVAR

The closest commercially available cultivars to the new variety are the‘AUSbrass’ (unpatented) and ‘AUSlofty’ (U.S. Plant Pat. No. 19,875). Thenew rose may be distinguished from the ‘AUSbrass’ based on the fact that‘AUSbrass’ has quartered formation and light green colored new wood,whereas ‘AUSquaker’ has brown/red new wood and unquartered blooms.‘AUSbrass’ is also pricklier than ‘AUSquaker’. ‘AUSlofty’ has bloomsthat are smaller in diameter and deeper than ‘AUSquaker’, and the growthof ‘AUSlofty’ is upright while ‘AUSquaker’ is arching.

BRIEF DESCRIPTION OF ILLUSTRATION

The accompanying photograph illustrates the new variety and shows theflowering thereof from bud to full bloom depicted in color as nearlycorrect as it is possible to make in a color illustration of thecharacter.

Throughout this specification, color references and/or values are basedupon The Colour Chart of The Royal Horticultural Society (2001) exceptwhere common terms of color definition are employed.

DESCRIPTION OF THE NEW VARIETY

Observations of budded ‘AUSquaker’ specimens were made at the nursery atDavid Austin Roses Limited in Albrighton, Wolverhampton, United Kingdom.The following description is of 1 year-old rose plants of the newvariety grown in a garden environment in Albrighton, Britain in themonth of June. Phenotypic expression may vary with environmental,cultural and climatic conditions, as well as differences in conditionsof light and soil.

FLOWER CHARACTERISTICS

-   Blooming habit: Recurrent. The number of blooms per plant during the    growing season is profuse, but there are too many to count.-   Bud:    -   -   Size.—About 2.5 cm long and 1.6 cm in diameter when the            petals start to unfurl.        -   Form.—The bud form is blunt topped.        -   Color.—When sepals first divide, the bud color is RHS 20A            (yellow-orange group) with RHS 60A (red-purple group). When            half blown, the upper sides of the petals are RHS 24A            (orange group), and the lower sides of the petals RHS 29A            (orange group).        -   Calyx.—Shape: star shape, folding back against the stem when            the flower is fully open. Length: 6.5 cm. Diameter: 6.5 cm.        -   Sepals.—Arrangement: Regularly arranged. Color: Upper            Surface: RHS 138C (green group). Lower Surface: RHS 144A            (yellow-green group) with RHS 184A (greyed-purple group).            Length: 2.6 cm. Width: 7 mm. Shape: Lanceolate. Surface            texture: Upper Surface: Downy. Lower Surface: Smooth.            Number: There are 3 lightly appendaged sepals, and 2            unappendaged sepals with glandular edges. The Sepal            extensions are weak.        -   Receptacles.—Color: RHS 144A (yellow-green group). Shape:            Funnel. Size: Medium, about 1 cm long×9 mm wide. Surface:            Smooth.        -   Peduncle.—Length: Medium, averaging about 6.5 cm. Surface:            Smooth. Color: RHS 144A (yellow-green group). Strength:            Weak.-   Blooms:    -   -   Size.—Large, average open diameter is about 10.5 cm.        -   Borne.—Several together usually with 3 to 6 blooms together            with inflorescence having a rounded shape.        -   Stems.—Strength: Normal, average length is about 35 cm.            Diameter: 5 mm.        -   Form.—When first open, bloom is cupped. Permanence of bloom:            outer petals curl back.        -   Type.—Double.-   Petalage: Number of petals under normal conditions: 76.    -   -   Color.—The upper sides of the petals are RHS 23B            (yellow-orange group) at the middle and RHS 29B (orange            group) at the top. The reverse sides of the petals are RHS            23B (yellow-orange group) at the middle and RHS 29B (orange            group) at the top. The base of the petals has a spot that is            RHS 12A (yellow group).        -   Variegations.—None.        -   Discoloration.—The general tonality at the end of the first            day is RHS 24A (orange group), and at the end of the third            day is RHS 24A (orange group). With further aging turns RHS            16B (yellow-orange group) particularly on outer petals.        -   Fragrance.—Slight. Character of fragrance: Tea.-   Petals:    -   -   Texture.—Smooth.        -   Size.—Width: 3.4 cm. Length: 4.3 cm.        -   Surface.—Smooth.        -   Shape.—Obovate.        -   Margin.—Entire.        -   Apex shape.—Rounded.        -   Base shape.—Acute.        -   Form.—Incurved.        -   Arrangement.—Informal.        -   Petaloids.—Number: Few, around 3-7. Color: RHS 29A (orange            group). Length: between 1-2.5 cm. Width: between 0.5-1.5 cm.            Shape: Deformed petal, some crescent-shaped, the shape of a            half-petal. Margin: Irregular.        -   Persistence.—Petals drop off cleanly before drying.        -   Lastingness.—On the plant: Fair. As a cut flower: not            tested.-   Reproductive parts:    -   -   Stamens.—Number: 80 approximately. Length: 7 mm.        -   Anthers.—Length: 2 mm. Color: RHS 15A (yellow-orange group).            Arrangement: Regular around styles with some partly tucked            in calyx.        -   Filaments.—Color: RHS 16A (yellow group). Length: 5 mm.        -   Pollen.—Color: RHS 17A (yellow-orange group). Amount:            Moderate.        -   Pistils.—Number: 30. Length: 5 mm.        -   Styles.—Color: RHS 67B (red-purple group). Length: 4 mm.        -   Stigmas.—Color: RHS 163B (greyed-orange group). Length: 1            mm.        -   Hips.—NONE Observed.

PLANT CHARACTERISTICS

-   Plant form: Shrub.-   Plant growth: Vigorous and arching.-   Age to maturity: 2 years.-   Mature plant: Height: 1.2 m. Width: 1.2 m.-   Rootstock: ‘Dr Huey’ in the US and Rosa dumetorum ‘Laxa’ for the    observed plants in the UK. Neither rootstock is patented in the US.-   Foliage:    -   -   Number.—Leaflets on normal mid-stem leaves is: 5 (including            terminal leaflet).        -   Size.—Medium, about 14 cm long×9 cm wide.        -   Quantity.—Normal. Number of leaves per flowering stem is:            7-10.        -   Color.—New foliage: Upper side: RHS 147A (yellow-green            group) tinged with RHS 183B (greyed-purple group). Lower            side: RHS 147B (yellow-green group). Old foliage: Upper            side: RHS 139A (green group). Lower side: RHS 137C (green            group).-   Leaflets:    -   -   Size.—About 5 cm long×3.8 cm wide.        -   Shape.—Pointed oval.        -   Base shape.—Rounded.        -   Apex shape.—Acuminate.        -   Texture.—Smooth.        -   Glossiness.—Strong.        -   Edge.—Serrated.        -   Serrations.—Single.        -   Petiole.—Color: RHS 144A (yellow-green group). Length: 4 cm.            Width: 1.5 mm. Surface Texture: glandular.        -   Petiole rachis.—Color: RHS 144A (yellow-green group).            Underside: with prickles.        -   Stipules.—Length: 2.1 cm, glandular. Color: RHS N144A            (yellow-green group).        -   Auricle.—Shape: Lanceolate. Length: 6 mm. Width: 2 mm.            Color: RHS N144A (yellow-green group).        -   Vein color.—Color: Upper side: RHS 139A (green group). Lower            side: RHS 137C (green group).        -   Venation pattern.—Reticulate.-   Wood:    -   -   New wood.—Color: RHS 183A (greyed-purple group). Bark:            Smooth.        -   Old wood.—Color: RHS 144A (yellow-green group). Bark:            Smooth.-   Branching habit:    -   -   Number.—20.        -   Lateral branch dimensions.—Length: 30 cm. Diameter: 5 mm.-   Stems:    -   -   Mature stem.—Length: 60 cm. Diameter: 7 mm.        -   Internode distance.—5 cm. The above measurements are all            variable, depending on growing conditions in a season.        -   Stem pubescence present.—No.-   Prickles:    -   -   Quantity.—On main canes from base: Ordinary. Number per stem            length: 12 per 20 cm. On laterals from main canes: Ordinary.            Number per stem length: 12 per 20 cm.        -   Form.—Deep concave.        -   Length.—8 mm.        -   Color when young.—RHS 183A (greyed-purple group) with RHS            144A (yellow-green group) tips.        -   Color when mature.—RHS 183A (greyed-purple group).-   Small prickles:    -   -   Quantity.—Main stalk: None. Laterals: None.-   Disease resistance:    -   -   Powdery mildew (Podosphaera pannosa).—Resistant.        -   Downy mildew (Peronospora species).—Resistant.        -   Blackspot (Diplocarpon rosae).—Resistant.        -   Rust (Phragmidium tuberculatum).—Resistant.-   Pest resistance: Not tested.-   Winter hardiness: Not tested.-   Growing conditions: Normal garden conditions.

What is claimed is:
 1. A new and distinct variety of rose plant of theshrub class, substantially as herein shown and described.